1523261 has 2 divisors, whose sum is σ = 1523262. Its totient is φ = 1523260.

The previous prime is 1523233. The next prime is 1523281. The reversal of 1523261 is 1623251.

It is an a-pointer prime, because the next prime (1523281) can be obtained adding 1523261 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012036 + 511225 = 1006^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 1523261 - 2¹⁴ = 1506877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1523281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761630 + 761631.

It is an arithmetic number, because the mean of its divisors is an integer number (761631).

2^1523261 is an apocalyptic number.

It is an amenable number.

1523261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1523261 is an equidigital number, since it uses as much as digits as its factorization.

1523261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 1523261 is about 1234.2046021629. The cubic root of 1523261 is about 115.0601072046.

The spelling of 1523261 in words is "one million, five hundred twenty-three thousand, two hundred sixty-one".